Effect of magnetic field on electrochemical properties of cobalt-based pseudosupercapacitors

IF 5.5 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta Pub Date : 2025-05-21 DOI:10.1016/j.electacta.2025.146473

Guliqire tuersun, Hugang Cui, Wenjiao Li, Yulong Wang, Yan Ma, Kai Feng, Changping Yang

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Abstract

In this paper, we investigated the electrochemical behavior of cobalt ferrite based (CoFe₂O₄) and its effects on its electrical properties under magnetic field conditions. We prepared the CoFe₂O₄ pseudocapacitive anode material by hydrothermal method. The structure and morphology were characterized by XRD, SEM, XPS and VSM. The electrochemical behavior and electrical properties of CoFe₂O₄ were tested and analyzed by cyclic voltammetry (CV), constant current charge and discharge (GCD), and AC impedance (EIS) under magnetic field conditions. The results showed that the applied magnetic field significantly improved the specific capacitance, energy density, and charge transport efficiency of the CoFe₂O₄. Under 7000 Gs (0.7 T) magnetic field, the specific capacitance of CV test increases from 163.9 F/g at zero field to 243 F/g, the lift ratio is 48.3 %, and the corresponding discharge time extends from 98 s at zero field to 143 s, the lift ratio is 51 %. The analysis demonstrated that the magnetic field affects the electron transport and ion diffusion process of the electrode material. This improves the electrochemical properties of the CoFe₂O₄. This study proposes a novel strategy and provides experimental evidence for magnetic field-regulated optimization of pseudocapacitive electrode materials.

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磁场对钴基伪超级电容器电化学性能的影响

本文研究了在磁场条件下铁氧体钴基（CoFe₂O₄）的电化学行为及其对其电性能的影响。采用水热法制备了硫酸铁伪电容负极材料。采用XRD、SEM、XPS和VSM对其结构和形貌进行了表征。采用循环伏安法（CV）、恒流充放电法（GCD）和交流阻抗法（EIS）测试和分析了CoFe₂O₄在磁场条件下的电化学行为和电学性能。结果表明，外加磁场显著提高了CoFe₂O₄的比电容、能量密度和电荷输运效率。在7000 g （0.7 T）磁场下，CV试验比电容从零场时的163.9 F/g增加到243 F/g，升力比为48.3%，放电时间从零场时的98 s延长到143 s，升力比为51%。分析表明，磁场影响电极材料的电子输运和离子扩散过程。这改善了CoFe₂O₄的电化学性能。本研究为赝电容电极材料的磁场调控优化提供了新的策略和实验依据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Electrochimica Acta 工程技术-电化学

CiteScore

11.30

自引率

6.10%

发文量

1634

审稿时长

41 days

期刊介绍： Electrochimica Acta is an international journal. It is intended for the publication of both original work and reviews in the field of electrochemistry. Electrochemistry should be interpreted to mean any of the research fields covered by the Divisions of the International Society of Electrochemistry listed below, as well as emerging scientific domains covered by ISE New Topics Committee.